CN111483283B - Suspension thrust bearing device and suspension strut equipped with such a device - Google Patents

Suspension thrust bearing device and suspension strut equipped with such a device Download PDF

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Publication number
CN111483283B
CN111483283B CN201911163561.2A CN201911163561A CN111483283B CN 111483283 B CN111483283 B CN 111483283B CN 201911163561 A CN201911163561 A CN 201911163561A CN 111483283 B CN111483283 B CN 111483283B
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CN
China
Prior art keywords
axial
suspension
bearing member
annular bearing
lower annular
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CN201911163561.2A
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Chinese (zh)
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CN111483283A (en
Inventor
X.布兰查德
G.朱安诺
B.蒙特波夫
D.维多特
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SKF AB
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SKF AB
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/07—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the damper being connected to the stub axle and the spring being arranged around the damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/045—Sliding-contact bearings for exclusively rotary movement for axial load only with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
    • B60G15/068—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit specially adapted for MacPherson strut-type suspension
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B60G2204/1242—Mounting of coil springs on a damper, e.g. MacPerson strut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/128—Damper mount on vehicle body or chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/418—Bearings, e.g. ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/02—Mechanical properties
    • F16C2202/06—Strength or rigidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein

Abstract

The invention relates to a suspension thrust bearing device (10) for use with a suspension spring (3) in a vehicle suspension strut. The device comprises: a bearing has upper and lower annular bearing members (20, 41;30, 42) that rotate relative to each other, the lower annular bearing member (30, 42), and a damping element (80). An axial stiffening insert (51) in the hub (31) of the lower annular bearing member (30) includes a lower end (53) that is curved towards the interior of the device (10). The lower annular bearing member (30) comprises at least one elongated groove (35) opening radially outwards and the bottom end of which opens axially downwards, the damping element (80) comprising a portion (86) fitting within said elongated groove (35).

Description

Suspension thrust bearing device and suspension strut equipped with such a device
Technical Field
The present invention relates to a suspension thrust bearing device, in particular of the MacPherson type ("MacPherson suspension bearing unit" or MSBU). The invention also relates to a strut for a motor vehicle comprising a damper and such a suspension thrust bearing arrangement. The field of the invention is that of suspension systems, in particular motor vehicle suspension systems.
Background
A motor vehicle suspension system comprises in a known manner a support shaft and a suspension strut for a vehicle wheel. A suspension thrust bearing arrangement is provided in an upper portion of the suspension strut opposite the wheel and the ground, and between the suspension springs and an upper support block attached to the vehicle chassis.
The suspension thrust bearing arrangement comprises at least one bearing, such as a rolling bearing, comprising an upper annular bearing member and a lower annular bearing member that are relatively rotatable about a main axis.
The suspension thrust bearing arrangement enables the transmission of axial forces between the spring and the body of the vehicle, and at the same time allows relative angular movement between the rotationally movable spring and a fixed support block attached to the body.
The damping function of the suspension thrust bearing arrangement can be improved by using a damping element made of an elastic material and mounted between the lower annular bearing member and the suspension spring. In a known manner, a damping element is overmoulded onto the lower member.
However, axial loading and vibration of the suspension spring on the damping element can cause axial and radial deformation of the element. A relative micro-displacement may be induced between the damping element and the lower bearing element. This undesired displacement of the damping element results in a separation of the damping element from the lower bearing element. The result is a negative impact on damping performance. The service life of the suspension strut may be shortened. It also causes additional noise that must be suppressed.
Disclosure of Invention
The object of the present invention is to overcome these drawbacks by proposing an enhanced suspension thrust bearing arrangement. It is desirable to provide a suspension thrust bearing device that is relatively inexpensive, has good operational reliability, and has an extended service life.
To this end, the invention relates to a suspension thrust bearing device for use with a suspension spring in an automotive suspension strut of a vehicle. The suspension thrust bearing arrangement includes a bearing having upper and lower annular bearing members that rotate relative to one another. The lower annular bearing member has an axial hub provided with an embedded axial stiffening insert.
The suspension thrust bearing arrangement further comprises a damping element made of an elastic material and interposed between the lower annular bearing member and the suspension spring, said damping element comprising an axial portion mounted on the outer surface of said axial hub of the lower annular bearing member.
According to the invention, the axial stiffening insert comprises a lower end which is curved towards the inside of the device. The axial hub of the lower annular bearing member comprises at least one elongated groove opening radially outwards and the bottom end of which opens axially downwards, the damping element comprising a portion fitting within said elongated groove. The elongated groove has a top wall inclined from the outer surface towards the bottom end in cross section, such as a ratio between a distance defined between the outer surface of the axial stiffening insert and the outer surface of the axial hub of the lower annular bearing member and a distance between the curved end of the axial stiffening insert and the inclined top wall of the at least one elongated groove being between 0.8 and 1.2.
Thanks to the invention, the material thickness of the lower annular bearing member is substantially constant along the axial stiffening insert. In this way, the component is stronger.
Another advantage of the invention is that the elongated groove forms a mechanical holding means for the axial portion of the damping element. The elongated groove prevents any relative rotation between the damping element and the lower annular bearing member.
According to an advantageous but non-mandatory further aspect of the invention, such a suspension thrust bearing arrangement may comprise one or more of the following features:
said ratio is between 0.9 and 1.1, and advantageously between 0.95 and 1.05.
The suspension thrust bearing arrangement comprises a bearing having a first ring fixed to the upper cover forming an upper annular bearing member of the suspension thrust bearing and a second ring fixed to the lower cover forming a lower annular bearing member of the suspension thrust bearing.
The first ring and the second ring are made of stamped sheet metal.
The upper and lower covers are made of a rigid plastic material.
The lower cover is provided with an axial hub of the lower annular bearing member.
The lower cover comprises an outwardly radially extending flange extending from the axial hub.
The axial reinforcement insert extends radially outwards by means of a radial portion which is embedded in an outwardly radially extending flange of the lower cover.
The bearing is a rolling bearing, the first ring and the second ring defining an annular rolling chamber therebetween, and at least one row of rolling elements is arranged within said rolling chamber.
The rolling elements are balls.
The damping element is molded directly onto the lower annular bearing member.
The damping element comprises a rubber thermoplastic elastomer (TPE), in particular a Thermoplastic Polyurethane (TPU), a melt-processible elastomer (MPE) or an elastomeric cellular foam.
-the lower annular bearing member comprises a plurality of said elongated grooves.
The elongated grooves are equally spaced apart in the axial direction.
The invention also relates to a motor vehicle suspension strut comprising a damper rod, a suspension spring and a suspension thrust bearing arrangement as described above.
Drawings
The present invention will now be explained with reference to the accompanying drawings, which serve as illustrative examples and not limiting purposes. In the drawings:
FIG. 1 is a cross-sectional view of a suspension strut according to a first embodiment of the present invention, including a suspension thrust bearing unit, a damper rod and a suspension spring, also according to the first embodiment of the present invention;
FIG. 2 is a detailed view of FIG. 1; and
fig. 3 is a perspective view of a lower cover body provided on the suspension strut of fig. 1.
Detailed Description
In part, shown in fig. 1, a suspension strut 1 is incorporated into a motor vehicle suspension system. The suspension strut 1 supports the vehicle axle and wheels (they are not shown for simplicity). The suspension strut 1 extends along a main axis X1, which main axis X1 is placed in a substantially vertical direction when the wheels of the vehicle are resting on a flat ground. The suspension strut 1 includes: a damping piston comprising a piston body and a damping rod 2 of axis X2; a coil suspension spring 3 and a suspension thrust bearing device 10. In fig. 1, the rod 2 and the spring 3 are partly shown, while the piston body is not shown for the sake of simplicity.
A suspension thrust bearing device 10 having a main axis X10 is mounted between the spring 3 and a support block (not shown) connected to the chassis of the motor vehicle. As shown in fig. 1, when the suspension system of the vehicle is in a stationary state, the axes X2 and X10 coincide with the principal axis X1.
In the following, the adjectives "axial" and "radial" are defined with respect to the main axis X10 of the annular thrust bearing device 10.
The suspension thrust bearing device 10 includes an upper cover 20, a lower cover 30, and a single rolling bearing 40. In this embodiment, the three components 20, 30 and 40 have an overall circular shape about a main axis X40 that coincides with the main axis X10 when the suspension system of the vehicle is in a stationary state.
The upper cover 20 comprises a one-piece part made of plastic composite material, for example made of polyamide, optionally reinforced with glass fibers. The upper cover 20 has a radially extending flange 21, an axially extending hub 22 of smaller diameter extending towards the underside of the suspension thrust bearing device 10, and an outer axially extending skirt 23 of larger diameter extending towards the underside of the suspension thrust bearing device 10. The inner hub 22 defines an inner bore 24 for the suspension thrust bearing device 10 in which the damper rod 2 is mounted.
The upper cover 20 is dedicated to the support blocks fixed to the chassis of the motor vehicle.
The rolling bearing 40 comprises a pressed sheet metal inner race 41, also a pressed sheet metal outer race 42, a row of rolling elements 43 (balls here) and a cage 44 for maintaining a regular circumferential spacing between the rolling elements 43. The rolling elements 43 are disposed in rolling chambers defined between raceways formed by annular portions of the inner race 41 and the outer race 42.
As an alternative, not shown, no rolling elements need be used, but rather the inner and outer races may be in direct contact with each other and a suitable low friction material, coating or lubricant used.
The rolling bearing 40 is located entirely radially between the inner hub 22 and the outer skirt 23 of the upper cover 20. The inner race 41 fits within the annular interior portion of the lower cap 30. The inner race 41 and the lower cover 30 form a lower annular bearing member. The outer race 42 is fitted onto an annular outer portion provided on the underside of the flange 21 of the upper cover 20. Outer race 42 and upper cover 20 form an upper annular bearing member. The upper and lower annular bearing members are relatively rotatable with respect to the axis X40.
The lower cap 30 comprises an axially extending hub 31 defining an inner bore 33 in which the stem 2 extends axially. The lower cap 30 further includes a radial flange 32 extending radially outwardly from the hub 31. An annular outer portion of an inner race 41 supporting the rolling bearing 40 is provided on an upper surface of the radial flange 32.
The lower cover 30 includes a reinforcing insert 34 extending along the hub 31 and flange 32 to support the load and impact applied by the spring 3.
As shown in fig. 1, the lower cover 30 is also provided with a reinforcing insert 50. The reinforcing insert 50 may be metal or rigid plastic. The stiffening insert 50 includes an axially extending hub 51 embedded within the hub 31 of the lower cap 30. The reinforcing insert 50 further comprises an outwardly radially extending flange 52 connected to the hub 51, said insert flange 52 being embedded within the radial flange 32 of the lower cover 30. Advantageously, the lower cover 30 is over-molded onto the reinforcing insert 50. The hub 51 of the reinforcing insert 50 allows supporting the radial load and impact applied by the suspension springs 3 to the hub 31 of the lower cap 30, and the flange 52 of the reinforcing insert 50 allows supporting the axial load and impact applied by the suspension springs 3 to the radial flange 32 of the lower cap 30. The reinforcing insert 50 allows preventing any deformation of the lower cover 30.
As shown in fig. 1 and 2, the lower end 53 of the axial hub 51 of the reinforcing insert 52 is curved toward the interior of the device 10. More precisely, the reinforcing insert 50 is obtained by deformation and cutting of a metal plate, and the end 53 of the hub 51 is cut after bending.
The inner sealing means 60 is disposed between the inner circumference of the radial flange 32 of the lower cap 30 and the inner hub 22 of the upper cap 20. The outer seal 70 is disposed between the outer periphery of the radial flange 32 of the lower cap 30 and the outer skirt 23 of the upper cap 20.
The lower cover 30 is further provided with a damping element 80 made of an elastic material so as to be able to filter vibrations.
The tubular axial portion 81 extends axially from the radial portion 82 toward the underside of the suspension thrust bearing device 10. The tubular axial portion 81 is tightly fastened to the outer cylindrical surface of the hub 31 of the lower cap 30. Said tubular axial portion 81 of the damping element 80 supports the radial load and the impact from the suspension spring 2.
The damping element 80 comprises a tubular axial portion 81 and a radial portion 82. The radial portion 82 is tightly secured to the underside of the radial flange 32 of the lower cover 30. The radial portion 82 includes a lower radial side for receiving the end turns of the bearing contact of the suspension spring 3. The radial portion 82 of the damping element 80 supports axial loads and impacts from the suspension spring 3.
The tubular axial portion 81 and the radial portion 82 of the damping element 80 are connected together so as to cover the outer surface of the axial hub 31 and the radial flange 32 of the lower cover 30.
The damping element 80 is made of an elastic material such as a rubber thermoplastic elastomer (TPE), in particular a Thermoplastic Polyurethane (TPU), a Melt Processable Elastomer (MPE) or an elastomeric cellular foam.
The damping element 80 is advantageously over-molded onto the lower cover 30.
Advantageously, the radial flange 32 of the lower cover 30 comprises a plurality of axial through holes 34. The through hole 34 extends radially from the underside of the support damper 80 through the thickness of the radial flange 32 to the upper side. In the embodiment shown in fig. 2, the radial through holes 34 are equally spaced apart in the circumferential direction. Alternatively, the radial through holes 34 may be unevenly spaced. In the embodiment shown in fig. 2, the radial flange 32 includes eight axial through holes 34. Alternatively, the radial flange 32 may include fewer or more axial through holes 34. In the embodiment shown in fig. 2, the axial through bore 34 is cylindrical. Alternatively, the axial through-hole may have any other suitable shape.
The radial flange 52 of the reinforcing insert 50 also includes a plurality of axial through holes 54. The radial flange 52 of the reinforcing insert 50 is embedded within the radial flange 32 of the lower cap 30, and the insert axial through bore 54 is disposed within the lower cap through bore 34. The insert axial through holes 54 are the same in number, location and center as the lower cap axial through holes 34.
The insert through holes 54 are each smaller in diameter than the cap through holes 34. The insert through holes 54 then define a narrow cross section in each cap through hole 34.
The radial flange 81 of the damping element 80 further comprises a plurality of pins 84 extending axially upward. The pins 84 are fitted into the respective axial through holes 34 of the lower cover 30 and into the respective axial through holes 54 of the insert 50, respectively. The pins 84 are each provided with a circumferential groove in which the insert 50 fits. Because the insert through bore 54 has a reduced diameter relative to the cap through bore 34, the pin 84 defines upper and lower shoulders that axially block the insert 50. Advantageously, the pin 84 of the damping element 80 is overmolded in said through holes 34, 54.
The combination of the pin 84 and the axial through holes 34 and 54 form an axial mechanical retention means for the damping element 80 and the lower cover 30. More precisely, the radial flange 82 of the damping element 80 is prevented from separating from the underside of the radial flange 32 of the lower cover 30.
As an alternative embodiment, not shown, the axial hub 31 of the lower cap 30 and the axial hub 51 of the reinforcing insert 50 may comprise associated radial through holes. The damping element 80 has a radial pin which fits within the hole and is radially blocked by an insert hole of reduced diameter relative to the cap hole.
According to the invention, the axial hub 31 of the lower cap 30 comprises a plurality of elongated grooves 35. The elongated grooves 35 each open radially outwardly and each bottom end thereof opens axially downwardly. The elongated grooves 35 each have a top wall 36 in cross section that slopes from the outer surface of the hub 31 towards the bottom open end of said groove 35.
The top walls 36 are respectively inclined, such as a ratio between a distance e51 defined between the outer surface of the axial hub 51 of the insert 50 and the outer surface of the axial hub 31 of the lower cover 30 and a distance e53 defined between the curved end 53 of the axial hub 51 of the insert 50 and the inclined top wall 36 of the elongated recess 35 being between 0.8 and 1.2. As an advantageous embodiment, said ratio is between 0.9 and 1.1, and advantageously between 0.95 and 1.05.
In the embodiment shown in fig. 3, the lower cover 30 includes a plurality of circumferentially equally spaced elongated grooves 35. Alternatively, the elongated grooves are unevenly circumferentially spaced. Alternatively, the lower cover 30 includes only one elongated recess 35.
The damping element 80 comprises a plurality of portions 83 fitted within said elongated recess 35. The combination of the portion 83 and the recess 35 forms a mechanical holding means for the damping element 80 and the lower cover 30. More precisely, the cooperation of the portion 83 and the groove 345 prevents any relative rotation between the axial hub 81 of the damping element and the axial hub 31 of the lower cover 30.
Representative, non-limiting examples of the present invention are described in detail above with reference to the accompanying drawings. This detailed description is merely intended to teach a person skilled in the art further details for practicing preferred aspects of the present teachings and is not intended to limit the scope of the invention. Furthermore, each of the additional features and teachings disclosed above can be utilized separately or in conjunction with other features and teachings to provide improved cam follower roller arrangements.
Furthermore, the various features of the representative examples described above, as well as the individual independent and dependent claims below, may be combined in ways that are not specifically and explicitly enumerated to provide further useful embodiments of the present teachings.

Claims (9)

1. A suspension thrust bearing device (10) for use with a suspension spring (3) in an automotive suspension strut of a vehicle, comprising:
-a bearing having an upper annular bearing member (20, 41) and a lower annular bearing member (30, 42) rotating relative to each other, the lower annular bearing member (30, 42) having an axial hub (31), the axial hub (31) being provided with an embedded axial stiffening insert (51), and
a damping element (80) made of an elastic material and interposed between the lower annular bearing member (30) and the suspension spring (3), said damping element (80) comprising an axial portion (81), which axial portion (81) is mounted on the outer surface of said axial hub (31) of the lower annular bearing member (30),
the method is characterized in that:
the axial stiffening insert (51) comprises a lower end (53) curved towards the inside of the device (10),
-the axial hub (31) of the lower annular bearing member (30) comprises at least one elongated groove (35) opening radially outwards and the bottom end of which opens axially downwards, the damping element (80) comprising a portion fitting inside said elongated groove (35), and
-the elongated groove (35) has, in cross section, a top wall (36) sloping from the outer surface towards the bottom end, the ratio between the distance (e 51) defined between the outer surface of the axial stiffening insert (51) and the outer surface of the axial hub (31) of the lower annular bearing member (30) and the distance (e 53) between the curved end (53) of the axial stiffening insert (50) and the sloping top wall (36) of the at least one elongated groove (35) being between 0.8 and 1.2.
2. The device according to claim 1, wherein the lower annular bearing member (30) comprises a plurality of the elongated grooves (35).
3. The device according to claim 2, wherein the elongated grooves (35) are equally spaced apart in the circumferential direction.
4. The device according to claim 1, wherein the suspension thrust bearing device (10) comprises a bearing (40) having a first ring (41) and a second ring (42), the first ring (41) being fixed to the upper cover (20) forming an upper annular bearing member of the suspension thrust bearing (10) and the second ring (42) being fixed to the lower cover (30) forming a lower annular bearing member of the suspension thrust bearing (10).
5. The device according to claim 4, wherein the lower cover (30) is provided with the axial hub (31) of a lower annular bearing member.
6. The device of claim 5, wherein the lower cover (30) comprises an outwardly radially extending flange (32) extending from an axial hub (31).
7. The device according to claim 6, wherein the axial stiffening insert (51) extends radially outwards by means of a radial portion (52), the radial portion (52) being embedded in an outwards radially extending flange (32) of the lower cover (30).
8. The device according to any of the preceding claims 1 to 7, wherein the damping element (80) is molded directly onto the lower annular bearing member.
9. A motor vehicle suspension strut (1) comprising a damper rod (2), a suspension spring (3) and a suspension thrust bearing device (10) according to any one of the preceding claims.
CN201911163561.2A 2019-01-29 2019-11-25 Suspension thrust bearing device and suspension strut equipped with such a device Active CN111483283B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019201118.7 2019-01-29
DE102019201118.7A DE102019201118A1 (en) 2019-01-29 2019-01-29 Suspension axial bearing device and a strut equipped with such a device

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CN111483283A CN111483283A (en) 2020-08-04
CN111483283B true CN111483283B (en) 2024-02-02

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US (1) US11396908B2 (en)
KR (1) KR20200094079A (en)
CN (1) CN111483283B (en)
DE (1) DE102019201118A1 (en)

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